Rotor for stone crushing apparatus



March 11, 1952 H. KESSLER 2,538,847

ROTOR FOR STONE CRUSHING APPARATUS FiLed July 5, 1947 v 2 SPEETSSHEET l mvzuroa,

er M ATTORNEY.

March 11, 1952 H. KESSLER 2,588,847

ROTOR FOR STONE CRUSHING APPARATUS Filed July 5, 1947 2 SHEETSSHEET 2 INVENTOR,

ATTORNEY.

Patented Mar. 11, 1952 UNITED STATES PATENT OFFICE 2,588,847 ROTOR FOR STONE CRUSI'IING APPARATUS Lee H. Kessler, Springville, N. Y. Application July 3, 1947, Serial No. 758,859

This invention relates to certain new and useful improvements in an impact crushing apparatus for stone and like material.

It has for one of its objects to provide an impeller type of crusher whose rotor-impact elements are so designed and supported as to provide for a maximum surface area and uniform wear, and which will reduce abrasive action on the stone to a minimum.

Another object of the invention is to provide a novel impeller or rotor for impact crushers having rotatable impact elements journaled thereon.

Other features of the invention reside in the construction and arrangement of parts hereinafter described and particularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1 is a side elevation, partly insection, showing my improved crusher. Figure 2 is a fragmentary perspective view, partly in section, of one of the impeller or rotor members with the impact elements thereon. Figure 3 is an enlarged fragmentary vertical section taken on line 33, Figure 1.

Similar characters of reference indicate corresponding parts throughout the several views.

By way of example, I have shown my invention in connection with a double impeller impact crusher which functions to break up or crush stone and like material by impact and while in suspension. It consists of a casing or housing l forming an enclosed crushing chamber into the upper end of which the stone to be crushed is delivered, as by a feed hopper ll, while the crushed stone is discharged from the lower end at l2. Disposed in the casing at opposite sides of the vertical center thereof are oppositely rotatable impact members in the form of rotors or impellers 13 which are mounted side by side on companion drive shafts l4 extending transversely through the casing between the inlet and discharge ends thereof and journaled at their ends in bearings I5. These rotors have impact elements l6 thereon and are adapted to be driven at a high rate of speed in opposite directions so that the opposing faces thereof turn upwardly and tend thereby to direct the intercepted ma terial, delivered between the rotors, upwardly and outwardly toward the top and opposite ends of the casing. A substantial space is provided above the rotors to afford a crushing zone for the rotor-trajected, suspended stone and disposed in predetermined fashion in the casing and in correlation to the rotors are stationary impact bars ll, 18 extending transversely thereof and 1 Claim. (Cl. 241 191)' against which the stone is trajected by the rotors and further broken or reduced from the resulting impact. The bars I! are disposed substantially axially over the respective rotors, while the companion impact bars 18 are disposed in a row along the ends of the casing in spaced relation to the end walls thereof and the rotors and extend upwardly to a point adjacent the top of the casing. Some of these impact bars [8 may be supported in the opposite side walls of the casing while others adjoining the rotors may be supported as a unit in side plates [9 adapted for yieldable movement toward and from the companion rotor, as when some hard, non-crushable object is encountered. Furthermore, these impact bars are properly spaced and function as a screen to size the stone before it is discharged from the machine by gravity along the ends of the casing and through the discharge opening l2.

While the rotors may be of any suitable construction, each is preferably composed of two end plates or disks 20 secured to attaching collars 2| keyed or otherwise fixed adjacent the ends of the rotor-shaft l4 and rotatably supported between these end plates are the impact elements l6. These impact elements, three of which are shown in the drawings equi-distant apart, are preferably in the form of rollers extending crosswise of the crushing chamber parallel to the shaft I4 and each supported at its ends in bearings 22 applied to a companion shaft 23 secured against rotation at its opposite ends in sleeves 24 detachably fastened by bolts 25 or the like to the companion rotor-disks 20, as shown in Figure 3. When removing and installing an impact roller, the end sleeves 24 are detached, the supporting shaft 23 is pulled endwise in one direction or the other through normally-covered openings in the side walls of the casing to disconnect it from the roller, after which the freed roller is removed through the top of the crusher-casing.

The impact rollers l6 extend at their outer peripheries beyond the peripheral edgesof the rotor-disks 20 and thereby provide a resultant space between the ends of these rollers and the opposing sides of the casing. Fitted in these spaces to prevent material lodging therein are inserts or segment-like liners 26 which are fastened in any suitable manner to the casing and which also function to absorb the wear from stone impact adjacent the ends of the rotors. During the operation of the machine, these impact rollers intercept and transmit multiple crushing blows to the introduced stone-and, direct it upwardly and outwardly in a trajectory-like path toward the top and opposite ends of the crusher-casing and against the impact bars I'l 18 to reduce it for ultimate passage between the bars 18 for discharge. This construction and arrangement of parts eifects the breaking or crushing of the material in suspension by impact in a very eflicient manner and with a minimum expenditure of power.

The provision of the impact rollers l6. which are free to rotate durin the operation of their rotors, reduces, to a minimum the. abrasive action of the stone thereon and they present a maximum of surface area with a resultant uniform wear over their entire surface, thereby making for a, longer life and requiring replacement less often.

I claim as my invention:

A rotor for use in a stone crusher of the type wherein the introduced stone is crushed by impact while in suspension, comprising a drive shaft having end plates fixed thereon, sleeves detaehably fitted in, an annular row, in, said, end plates about and parallel to. the drive shaitrollershafts disposed between the, end plates; secured to said sleeves against rotation. relat'me thereto, bearings applied to, said roller-shaitsirrwardly of said sleeves, and tubular impact rollers applied to said last-named shafts and supported at their ends on said bearings.

LEE H. KESSLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 12,031 Plumb Dec. 5, 1854 536,225 McKellar Mar. 26, 1895 696,623 Qiolgson Apr. 1, 1902' 1,130,251 I Boero Mar. 2, 1915 1,609,529 Trowbridge Dec. 7, 1926 1,683,304 Roebke Sept. 4, 1928 1,759,448 Frickey May 20, 1930 1,806,980 Kreutzberg May 26, 1931 2,054,507 Mankoff Sept. 15, 1936 2,324,382 Goodwin July 13, 1943 2,339,390 Fowler 1 Jan. 18, 1944 2,362,366 Fowler, Nov. '7, 1944 2,373,691 Kessler Apr. 17,, 1945 2,403,638 Clark July 9, 1,946 

